From 1c220881e307b62cc2f77d911219de332aa3f61e Mon Sep 17 00:00:00 2001
From: Josh Durgin <josh.durgin@inktank.com>
Date: Fri, 4 Apr 2014 17:49:12 -0700
Subject: [PATCH] rbd: make discard trigger copy-on-write

Discard requests are a form of write, so they should go through the
same process as plain write requests and trigger copy-on-write for
layered images.

Signed-off-by: Josh Durgin <josh.durgin@inktank.com>
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Reading git-format-patch failed